Having trouble with this code - Overclock.net

Chim3ra · 06-10-05

#include <stdio.h>

int main(void)
{
int a, b, c, sum;

printf("Input three integers: ");
scanf(%d, %d, %d, a, b, c);
sum = (((a + b + c) * 2) + 7);
printf("Twice the sum of your integers plus 7 is sum");
}

I tried different things but it says the variables aren't defined but i thought thats what scanf was for? so in my eyes it's clearly defined, and if i change other things i get another error that pops up the "send error report" dialogue box. Anyone know what I'm doing wrong?

*muffin* · 06-10-05

Why you put int before main(void)?

**BFRD** · 06-10-05

Quote:

Originally Posted by muffin

Why you put int before main(void)?

probably should be void as the function doesn't return anything

ouroboros1827 · 06-10-05

i'm a noob. slay me. this post isn't worth taking up your screen, so i deleted it.

better post can be found below

*muffin* · 06-10-05

I was gonna say, never seen it done like that...

void main() or void main(void) I think?

Chim3ra · 06-10-05

none of that is working for some reason. the reason i have it set up in that manner (int main(void)) is because thats how the text states to write it up. originally when i built the program it gave me a couple of errors but i was missing a quotation mark and a semicolon. after that it built fine but the error was when i went to debug it. it would display the user input line and when i hit enter it would fail.

*VulcanDragon* · 06-10-05

It doesn't look like you're using scanf correctly. Take a look at this page for some tips and examples on scanf:

http://www.cplusplus.com/ref/cstdio/scanf.html

Chim3ra · 06-10-05

Quote:

Originally Posted by ouroboros1827

no no no.
you have:
int main(void)
put:
void main()

your main() doesn't return anything, so keep it void, but args go in the parentheses. you don't have any, so don't put any in there

change that line.

EDIT: actually (now that i remember c++), you should make main(): int main(), and return 0;

it's usually better to keep it that way. also gcc doesn't like it void main(). idk why.

also, scanf should be:

scanf("%d", a);

code attached.

isn't the return 0 already part of the header though? my book says its not necessary to put it in there since it's already built in

ouroboros1827 · 06-10-05

alright. i think i have regained some knowledge through this. thank you.

FIXED NEW code attached.

Chim3ra · 06-10-05

Thanks guys, all your inputs have helped. I'm still having one more problem though. The sum won't print. when i use %d in front of sum it kicks out some kind of crazy number that isn't correct. it should be 31, but i'm getting like 21XXX. any other ideas?

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Having trouble with this code

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